Da Qin: from Emperor's Son-In-Law to Emperor's Master!

In the thirty-second year of the First Emperor's reign, Su Mu woke up from his palace bed in a daze, and in his arms lay a charming young woman. And this person turned out to be the First Emperor's most beloved daughter, Princess Yangzi of the Qin Empire! When Ying Zheng learned about this, he immediately became furious and flew into a rage. In a critical moment, he had no choice but to expose the identity of the traveler and rely on his advanced knowledge to save his life. Since then, Su Mu officially started his cheating journey. Build water chariots, make gunpowder, hold imperial examinations, and rule the world. Forge a steel fleet to conquer the world. Unknowingly, the great Qin Dynasty that died in the second generation in the history books has turned into an invincible behemoth. From the beginning of the First Emperor, one life, two generations, until the eternity! (The introduction is weak, please read the text)